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本研究的目的是探讨窦道通过术对有窦型慢性根尖周炎的作用。选择９６例患有有窦型慢性根尖周炎的成年恒牙。常规根管预备后，将３％ 双氧水从根管注入并从窦道口流出。３个月后，通过临床和Ｘ线片表现观察疗效。结果显示：痊愈率（显效率）为９７．７％ ，总有效率为９６．９％ 。本研究说明，应用３％ 双氧水作窦道通过术对有窦型慢性根尖周炎有明显的治疗作用。
The purpose of this study is to investigate the effect of sinus surgery on sinus apical periodontitis. Ninety-six adult permanent teeth with chronic periapical periodontitis were selected. Conventional root canal preparation, the 3% hydrogen peroxide from the root canal injection and outflow from the ostium. Three months later, the efficacy was observed by clinical and radiographic manifestations. The results showed that: the cure rate (markedly effective) was 97.7%, the total effective rate was 96.9%. This study shows that the application of 3% hydrogen peroxide for sinus surgery has significant therapeutic effect on sinus chronic periapical periodontitis.